Method for making modified sandy soil

Abstract

The invention discloses a method for making modified sandy soil, which is formed by dissolving water-soluble solid organic substances in water to form a solution with cohesiveness and adhesion, and then mixing with sandy soil; after the water evaporates, the Solid organic substances that can dissolve in water can bond sand particles and can be dissolved in water again after encountering water to form a cohesive and adhesive solution to bond sand particles. The present invention makes general sand "soil", from It fundamentally changes the interaction relationship between sand particles and forms a particle pore structure with cohesion (cohesion); during use, the material is difficult to lose due to its cohesive and adhesive characteristics; it makes the sand have The performance of stabilizing and storing water and nutrients like soil can provide solid conditions for plant growth, and is an ideal measure to control sandy soil and deserts; at the same time, modified sandy soil can also be used as a means of utilizing sand resources such as beaches and sandy land , for planting.

Description

technical field [0001] The invention relates to the fields of utilization of sandy soil resources and control of land desertification, in particular to a production method capable of obtaining modified sandy soil with soil properties. Background technique [0002] Sandy soil refers to soil with a lot of sand. The sandy soil is loose and has good water permeability and air permeability, but its ability to retain water and fertilizer is poor, so it needs to be improved during cultivation. Sandy soil is not suitable for the growth of certain plants. When the sand content is high, it is similar to the surface sand or sandy soil in deserts or desertified areas. In addition to natural existence, sandy soil is mostly formed by land desertification. [0003] (1) Desertification and its hazards [0004] Desertification is the most serious major environmental problem facing mankind today. [0005] The land area of ​​the world is 162 million square kilometers, accounting for 30.3% o...

AI Technical Summary

Problems solved by technology

However, emulsified asphalt also exists during use because the asphaltene and resin in the asphalt are easily destroyed by oxygen, light, heat, moisture and microorganisms in the atmosphere, and the oil content decreases.

The gradual intensification of this change will lead to the deterioration of asphalt performance, such as the increase of softening point, the decrease of penetration, and the decrease of elongation, so that the united layer gradually becomes brittle, hard, loses plasticity, ages, and eventually cracks and dies. Destroyed by wind erosion, losing sand-fixing effect

[0022] (3) Fundamental difficulties and existing problems in desertification control

However, the particles in the sand are discrete particles, and the fundamental difficulty in governance is that the particles in the sand are easy to move, difficult to retain water and store nutrients

Based on the current sand control measures, it is not difficult to find that the existing sand and desert control methods are far from fundamentally solving the two problems of easy movement of particles in sand and difficulty in water retention and storage of nutrients.

[0024] The existing sand control methods are the same as the desert control methods, which mainly focus on sand fixation. Regardless of the engineering (mechanical) measures, plant measures and chemical measures, they do not start from improving the properties of the sand itself, but only avoid the movement of sand and sand. Therefore, from the point of view of its methods and methods, it is still a passive governance, which can overcome the problem of desertification to a certain extent or in a short period of time, but it is difficult to fundamentally solve the problem that sandy soil is difficult to retain water and store nutrients. There is still a long way to go for the "sand and soil into an oasis" that people hope

[0025] ①Engineering (mechanical) measures can temporarily change the physical form (natural existence mode) of deserts and sandy soils. It is a temporary sand prevention measure. For the harm of quicksand, it only plays the role of sand-fixing and "curing the surface". The sandy soil is short-lived. If it is tamed, it cannot achieve the effect of "curing the root cause". After a long time, the sandy soil will still return to its original appearance

[0030] Plant sand fixation uses the upper part of the plant to block sand and sand, and uses the root of the plant to fix sand, which can change the microclimate and micro soil environment to a certain extent. However, the fundamental difficulty of plant sand fixation is that the desert and sand itself are not conducive to plant growth, such as sandy soil is unstable. Moreover, frequent wind and sand movement, poor sandy soil, insufficient water and difficulty in water retention and temperature adjustment will have adverse effects on plants.

[0031] Wind and sand movement can cause plants to be harmed by blowing erosion, sand burial and sand cutting. The wind and sand movement can be solved by engineering protection measures and chemical sand fixation. However, the fundamental problem of insufficient water in the sand and difficulty in water retention limits the applicability of traditional plant sand fixation. extremely restrictive